During the Russo-Japanese war in the Meiji Era's 37th year, a small Japanese army enlists the help of a unique flying vessel, the Amanohara, powered by a kind demon, to strike Russia's key base at Port Arthur (Lushun). Umakai Shintaro, a Russian diplomat of Japanese descent, switches sides and heads to Sapporo to educate at a peculiar girls' academy situated aboard the Amanohara. Here, he mentors the Raimu Unit, five girls with the gift to summon formidable entities for combat. As their instructor and leader in battles, Shintaro guides them on an eccentric and sensually charged odyssey, aiding the girls in conquering their vulnerabilities, growing resilient for the ultimate showdown at Lushun. Amidst this, he delves into the intentions of the